This study applied a set of factors previously identified as being linked with stress resistance to the prediction of both stable and improved psychological functioning over a 1-year interval with more than 400 community-resident adults. Stable psychological functioning under high stressors is predicted at the beginning of the year by personal and social resources that are linked to functioning through their influence on increased approach coping during the year. In contrast, improved psychological functioning under low stressors is predicted directly by initial resources. As predicted by crisis theory, improved functioning under high stressors is related to an increase in resources during the year. The findings are discussed in the context of an extension of the stress-resistance paradigm beyond illness prevention toward a general, adaptively oriented health framework.